A circuit breaker device for protecting a low-voltage electric circuit includes a mechanical break contact unit connected in series with an electronic interruption unit. The break contact unit is switchable by opening contacts to prevent current flow or by closing the contacts to allow current flow in the low-voltage circuit. The electronic interruption unit is switchable by semiconductor-based switching elements into a high-resistance state of the switching elements to prevent current flow or into a low-resistance state of the switching elements to allow current flow in the low-voltage circuit. The amplitude of the current in the low-voltage circuit is ascertained to provide instantaneous current values which are compared with at least one current threshold value, and if the threshold value is exceeded, prevention of current flowing in the low-voltage circuit is initiated. The at least one current threshold value is adjusted according to a temperature level of the circuit breaker device.

A circuit breaker device for a low-voltage circuit has a mechanical isolating contact unit connected in series with an electronic disconnection unit. The mechanical isolating contact unit is switched by opening contacts to prevent current flow or closing the contacts for current flow in the low-voltage circuit. The electronic disconnection circuit is switched by semiconductor-based switching elements into a high-resistance state of the switching elements or into a low-resistance state of the switching elements for current flow in the low-voltage circuit. When the amount of an instantaneous current value of the low-voltage circuit exceeds at least one current threshold value, prevention of the current flow of the low-voltage circuit is initiated. The at least one current threshold value is adjusted according to the magnitude of the voltage of the circuit breaker device.

A circuit breaker device has a mechanical break contact unit connected in series with an electronic interruption unit. The mechanical break contact unit is switched by breaking contacts to prevent current from flowing or by closing the contacts to allow current to flow in the low-voltage circuit. The electronic interruption unit is switched by semiconductor-based switching elements into a high-impedance state of the switching elements to prevent current from flowing or into a low-impedance state of the switching elements to allow current to flow in the low-voltage circuit. An amplitude of the current in the low-voltage circuit is ascertained such that analog momentary current values are provided which are compared with a current threshold value by an analog comparator, and if the threshold value is exceeded, prevention of current flowing in the low-voltage circuit is initiated, in particular by switching the electronic interruption unit into the high-impedance state.

A direct-current switching device for interrupting an electric direct current flowing along a medium or high-voltage current path, includes an electric circuit assembly having a mechanical switching device to be switched in the medium or high-voltage current path. The electric circuit assembly further has an LC circuit with an inductive component in order to force a current zero crossing in the mechanical switching device connected in the medium or high-voltage current path, a capacitive component for forming a resonant circuit being closed by the switching device, and a switchable semiconductor component for generating an excitation frequency exciting the resonant circuit. The switchable semiconductor component is disposed in the electric circuit assembly such that the semiconductor component constantly lies outside of the medium or high-voltage current path when the mechanical switching device is connected in the medium or high-voltage current path.

A low-voltage protection switch unit, such as a motor protection switch, includes: at least an external conductor line, from an external line supply terminal of the low-voltage protection switch unit to an external line load terminal of the low-voltage protection switch unit; a neutral conductor line, from a neutral conductor terminal of the low-voltage protection switch unit to a neutral conductor load terminal of the low-voltage protection switch unit; a mechanical bypass switch arranged in the external conductor line; a semiconductor circuit arrangement connected in parallel with the mechanical bypass switch; an electronic control unit for actuating the mechanical bypass switch and the semiconductor circuit arrangement in a specifiable manner; and a current measurement arrangement connected to the electronic control unit, the current measurement arrangement being arranged at least in the external conductor line. The electronic control unit switches the semiconductor circuit arrangement on/off in a specifiable clocked manner.

A device comprising a gate pad, a source pad and a passive actuator arranged to form a reversible mechanical and electrical connection between the gate pad and the source pad only if the temperature in the passive actuator exceeds a threshold value.

An arc quenching device, which prevents a load device from displaying an unnecessary behavior during starting of a power supply, includes: a semiconductor switch connected in parallel to a first switch which is mechanical; a power supply circuit configured to use a voltage which is generated between both contact points of the first switch to output a voltage which causes the semiconductor switch to turn on; and a second switch configured to cause its open state to prevent the semiconductor switch from turning on.

A two terminal arc suppressor for protecting switch, relay or contactor contacts and the like comprises a two terminal module adapted to be attached in parallel with the contacts to be protected and including a circuit for deriving an operating voltage upon the transitioning of the switch, relay or contactor contacts from a closed to an open disposition, the power being rectified and the resulting DC signal used to trigger a power triac switch via an optoisolator circuit whereby arc suppression pulses are generated for short predetermined intervals only at a transition of the mechanical switch, relay or contactor contacts from an closed to an open transition and, again, at an open to a close transition during contact bounce conditions.

An isolation disconnect assembly for an insulated gate bipolar transistor assembly is provided. The isolation disconnect assembly includes a conductor assembly and a clinch joint magnetic actuator.

The invention provides an intelligent moxibustion device, comprising a vertically disposed barrel, an ash tower buckled with the barrel, a moxa stick driving unit and an intelligent control unit disposed in the barrel; wherein the moxa stick driving unit comprises a moxa stick sleeve and a stepping motor disposed above the moxa stick sleeve; the stepping motor drives the moxa stick to move up and down through the transmission of a gear; the intelligent control unit comprises a battery disposed above the stepping motor for powering the entire moxibustion device, a circuit board fixed above the battery, and a temperature sensor disposed in the ash tower, the battery being connected to the circuit board to provide power to the circuit board, the circuit board being connected to the temperature sensor through input and output terminals.